The L.A. County Sheriff's Department Parks Bureau said 38,952 people attended Saturday's event, held at the Whittier Narrows Golf Course. There were 67 arrests Saturday; seven were felonies and 60 were misdemeanors.
Forty-seven people were arrested Sunday: 38 for alcohol-related offenses.
Some people were arrested Saturday for trying to climb over fences; others were cited for false identification misdemeanors.
The Bureau said narcotics were likely involved in some of the arrests.